[math]{[(1+2/5-1/2)^2:(-9/10)^2+(-2+5/3)^2]^2:(-10/9)^2}^4-3+2/5[/math]
[math]{[((10+4-5)/10)^2:(+9/10)^2+((-6+5)/3)^2]^2:(+10/9)^2}^4-3+2/5[/math]
[math]{[(9/10)^2:(9/10)^2+(-1/3)^2]^2:(+10/9)^2}^4-3+2/5[/math]
[math]{[1+(1/3)^2]^2:(10/9)^2}^4-3+2/5[/math]
[math]{((9+1)/9)^2:(10/9)^2}^4-3+2/5[/math]
[math]{(10/9)^2xx(9/10)^2}^4-3+2/5[/math]
[math]{1}^4-3+2/5[/math]
[math]1-3+2/5[/math]
[math]+2/5-2[/math]
[math](+2-10)/5[/math]
[math]-8/5[/math]